A question about US Mint proof sets.
Ever since I was about 3, my grandpa has bought my sister and I US Mint proof sets every Christmas. Except, apparently this year they'd sold out of them. But that's not what this is about.
After he found out he wasn't getting any from where he usually gets them (probably the US mint), he decided to check out a coin dealer. Well, the coin dealer had none, either, but during the course of conversation, the coin dealer did mention that 2001 sets had gotten to be quite valuable (about 4 times the original price). Now obviously I could check and see how much the set I have is worth, and if it's one of the more valuable ones I could sell it.
The question is, however, would it be wise to sell it right now? Or should I wait and see if the value goes up any more? Should I just hold on to the sets indefinitely and have them as an heirloom should I ever decide to reproduce/adopt?
Are there any coin collectors in the house that might be able to predict the price of the coin sets over the next 10+ years? Also, are there any sets of remarkable value between ~1986 and now? Any help would be appreciated greatly.
(As a side note, I'm in the process of moving right now, so any response could be delayed a few days, though I probably will be able to respond this evening. Hopefully.)